| Purpose | Private Key | Public Key |
|---|---|---|
| SFTP Connection (SSH Key Pair) | Client Authentication | Server Authentication |
| PGP Encryption | N/A | Recipient’s Public Key |
| PGP Decryption | Recipient’s Private Key | N/A |
| PGP Signing | Sender’s Private Key | N/A |
| PGP Signature Verification | N/A | Sender’s Public Key |